需求：使用微信浏览器获取用户定位，并使用高德地图获取当前地址，并计算两点之间距离

1.先安装微信sdk

npm i weixin-js-sdk -S

在需要的页面引用：import wx from "weixin-js-sdk";

2. 获取timestamp和nonceStr，并初始化微信JS-SDK配置

具体文档：网页授权 | 微信开放文档

接口调用说明：概述 | 微信开放文档

 async getWxConfigConfig() {
      try {
        var url = window.location.href.split("#")[0];
        let axiosUrl = "接口地址";
        const data = {
          url: url,
        };
        const { data: res } = await axios.post(
          `${axiosUrl}`,
          qs.stringify(data)
        );
        const wxconfig = {
          appId: res.data.appid,
          timestamp: res.data.timestamp,
          nonceStr: res.data.nonceStr,
          signature: res.data.signature,
        };
        wx.config({
          debug: false,
          appId: wxconfig.appId,
          timestamp: wxconfig.timestamp,
          nonceStr: wxconfig.nonceStr,
          signature: wxconfig.signature,
          jsApiList: [
            "updateAppMessageShareData",
            "updateTimelineShareData",
            "checkJsApi",
            "openLocation",
            "getLocation",
          ],
          openTagList: ["wx-open-subscribe"],
        });
        wx.ready(() => {
          //获取用户当前位置
          wx.getLocation({
            type: "wgs84",
            success: (res) => {
              const { longitude, latitude } = res;
              this.userLocation = { longitude, latitude };
              this.getUserProvince();
            },
            cancel: () => {
              console.log("用户拒绝授权获取地理位置");
            },
            fail: (error) => {
              console.error("获取用户定位失败", error);
            },
          });
        });
      } catch (error) {
        console.error("微信配置失败", error);
      }
    }, 

3.根据经纬度用高德获取当前所在城市地址（首先先申请高德Key）

 async getUserProvince() {
      try {
        if (!this.userLocation) {
          console.error("用户位置不可用");
          return;
        }
        const { longitude, latitude } = this.userLocation;
        const amapApiKey = "高德API Key";
        const mapurl = `https://restapi.amap.com/v3/geocode/regeo?key=${amapApiKey}&location=${longitude},${latitude}&output=JSON&batch=false&roadlevel=0`;
        const response = await axios.get(mapurl);
        var rcd = response.data.regeocode;
        this.addr = rcd.addressComponent.district;
        console.error("找不到当前位置");
      } catch (error) {
        console.error("获取当前位置失败", error);
      }
    },

4.计算两点之间距离

 getDistance(item) {
      if (!this.userLocation) {
        return "计算中...";
      }
      // 将纬度和经度转换为地图。LngLat对象
      const point1 = new AMap.LngLat(
        this.userLocation.longitude,
        this.userLocation.latitude
      );
      const point2 = new AMap.LngLat(item.longitude, item.latitude);
      // 以米为单位计算距离
      const distance = AMap.GeometryUtil.distance(point1, point2);
      // 将距离转换为公里，四舍五入到小数点后一位
      const distanceInKm = Math.round(distance / 100) / 10;
      return `${distanceInKm} km`;
    },

5.打开地图

openMap() {
      wx.openLocation({
        latitude: parseFloat(latitude), // 纬度，浮点数，范围为90 ~ -90
        longitude: parseFloat(longitude), // 经度，浮点数，范围为180 ~ -180。
        name: title,
        address: site, // 地址详情说明
        scale: 15,
      });
    },